Class 7 Science Chapter 18 MCQ (Multiple Choice Questions) of Wastewater Story in English Medium updated for CBSE Session 2022-2023. All the questions are important and useful of terminal exams and class tests. MCQs are design in such a way it covers the entire chapter 18 of class 7 science. There are about 60 questions in all divided into 10 MCQ online tests.

Class 7 Science Chapter 18 MCQ for 2022-2023

Class: 7Science
Chapter: 18Wastewater Story
Contents: MCQ Online Quiz with answers

MCQ Tests with Answers for Class 7 Science Chapter 18

Q1

Which of the following is wastewater?

[A]. Water trickling from a damaged tap
[B]. Water coming out of a shower
[C]. Water flowing in a river
[D]. Water coming out of a laundry
Q2

Which of the following statement is or are incorrect?

[A]. The wastewater and faeces from homes and other buildings which is carried away in sewers, is called sewage.
[B]. The bacteria present in sewage include those bacteria which cause water-borne diseases such as cholera and typhoid.
[C]. An underground pipe which carries away dirty drainage water and waste water, is called a sewer.
[D]. None of the above.
Q3

Which of the following is or are products of wastewater treatment?

[A]. Biogas
[B]. Sludge
[C]. Both biogas and sludge
[D]. Aerator
Q4

Open drain system is a breeding place for which of the following?

[A]. Flies
[B]. Mosquitoes
[C]. Organisms which cause disease
[D]. All the above
Q5

Read the following sentences carefully, and choose the incorrect one:

[A]. Use water is waste water which can be recycled.
[B]. Wastewater is treated in a sewage treatment plant.
[C]. By products of wastewater treatment are sludge and biogas.
[D]. Sewage is a liquid waste which causes water pollution.
Q6

Arpit appeared in class test but he confused to know the correct statement. Would you help him to know that?

[A]. Open drain system is a breeding ground for flies, mosquitoes and organisms which spread diseases.
[B]. Waste water is produced in houses, industries, agricultural fields and other human activities which is known as sewage.
[C]. When underground sewage system and refuse disposal system not possible, the low cost on site sanitation system may be adopted.
[D]. All the above.
Q7

Pick from the following one chemical which is used to disinfect water?

[A]. Chlorine
[B]. Washing soda
[C]. Silica
[D]. Coal
Q8

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. Bacteria which can grow and multiply in absence of free oxygen are called anaerobic bacteria.
[B]. Water which is cleared from the floatable substances like oil and grease by a skimmers is called clarified water.
[C]. Waste water solids like faeces, which settle down at the bottom of a large tank and are removed with a scraper are called sludge.
[D]. None of the above.
Q9

The full form of WWTP is:

[A]. World Wide Transport Programme
[B]. Waste Water Treatment Plant
[C]. World Workers’ Talent Programme
[D]. None of these.
Q10

Which of the following is a part of inorganic impurities of the sewage?

[A]. Pesticides
[B]. Urea
[C]. Phosphate
[D]. Vegetable waste
Q11

Which is used in vermi processing toilets?

[A]. Cockroaches
[B]. Earthworms
[C]. Snail
[D]. Silkworms
Q12

Gunja is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Gunja wants to take help from you:

[A]. The wastewater or sewage entering the sewage treatment plant is the first passed through bar screens.
[B]. The wastewater passing through the bar screen is made to flow slowly through a tank called “grit and sand removal tank”.
[C]. The sludge is taken out from the bottom of first sedimentation tank and put into a large, closed tank called “digester tank”.
[D]. None of the above.
Q13

Select the one that is incorrect for wormy processing toilet:

[A]. It is a new method and has been recently tested in India.
[B]. In it the human excreta are treated by cockroaches and round worms.
[C]. In it the human excreta are completely converted into vermi-cakes.
[D]. It is an ideal, low water use toilet that is safe for processing of human waste.
Q14

Which of the following is not a source of wastewater?

[A]. Sewers
[B]. Homes
[C]. Industries
[D]. Hospitals
Q15

“No one need to wait for anyone else to adopt a humane and enlightened course of action.” – said by:

[A]. Mahatma Gandhi
[B]. Pandit Jawaharlal Nehru
[C]. Sardar Vallabhbhai Patel
[D]. Subhas Chandra Bose
Q16

Which of the following is not an inorganic impurity present in sewage?

[A]. Nitrate
[B]. Phosphate
[C]. Urea
[D]. Metal salt
Q17

Which of the following organisms produce biogas from sludge in the digester tank of a wastewater treatment plant?

[A]. Anaerobic bacteria
[B]. Fungi
[C]. Aerobic bacteria
[D]. Protozoa
Q18

In this year board examination, Ajju were asked a question where he had to choose the statement which was/were correct? Will you be able to answer this question?

[A]. World Water Day 2020, on 22 March, is about water and climate change.
[B]. The theme of 2019 was about tackling the water crisis by addressing the reasons why so many people are being left behind
[C]. In 2017, the theme was “Why Waste Water?” which was about reducing and reusing wastewater.
[D]. All the above
Q19

Durgesh is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?

[A]. Waste cooking oils and fats should not be thrown in the kitchen sink to go down the drain.
[B]. The climate like paints, solvents, insecticides, medicines and motor oil etc., should not be thrown down the drain.
[C]. The wastes such as solid food remains, used tea leaves, sanitary towels, polythene bags used cotton, hair etc., should not be thrown the drains.
[D]. All the above
Q20

Which of the following is not a water-borne disease?

[A]. Cholera
[B]. Tuberculosis
[C]. Typhoid
[D]. Dysentery
Q21

One of the following type of trees are said to help in purifying wastewater quite rapidly when planted all along the sewage ponds. These are:

[A]. Eucalyptus tree
[B]. Ficus tree
[C]. Neem tree
[D]. Peepal trees
Q22

Which of the following statement is or are incorrect?

[A]. All the portable toilets are chemical toilets.
[B]. Septic tanks and composting pits are called on-site sewage facility.
[C]. Septic tanks are suitable for those places where there is no sewage system.
[D]. The human waste can not be used in a biogas plant for making biogas.
Q23

The examples of onsite sewage disposal system for human waste are:

[A]. Septic tanks
[B]. Composting pits and
[C]. Chemical toilets.
[D]. All the above
Q24

In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

[A]. Poor sanitation in crowded public places can result in the spread of diseases.
[B]. Open dirty water drains are breeding place for flies, mosquitoes and other disease-causing organisms.
[C]. If all the wastes produced at public places are not disposed at of regularly and properly, even epidemics could break out.
[D]. Only the responsibility of the municipality of the area to maintain sanitization or hygienic condition.
Q25

Vacuum toilets are usually used in:

[A]. Superfast trains
[B]. Cinema halls
[C]. Aeroplanes
[D]. Large ships

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